Bumper mechanism



May 8, 1928.

E. F. OHLENDORF BUMPER MECHANISM 5 Sheets-Sheet 1 Filed May 3l, 192'?(g1/vantava 61H0: naw( May 8, 1928.

E. F. OHLENDORF BUMPER MECHANISM Filed May 3l. 192'? 3 Sheets-Sheet 2May 8, 1928. 1,669,140

E. F. OHLENDORF BUMPER MECHANISM Filed May 3l. 1927 3 Sheets-Sheet 3 1l'in W c ri S14/vento@ an/'7. ofpzendaya'.

ally connected at one end to the outer endV ot therpin 11 and is formedat the pivotal .end with projections 25a to engage the link 16 and movethe pin 11 and bushing 21 outwardly. rllhe inner ends of the levers 2Oengaging the bushing 21 move outwardly therewith which results in theretainer 18' i being pressed inwardly, thereby clamping the member 6between the elements 17. A recess 1Ga formed inthe outer side of thelink 16'receives the end ofthe lever 25 and prevents side movementthereof.` The pivotal` end 'of the lever 25l is forked and embraces thepin 11 to which it is pivoted by a tfecting the tension on the pin 11.The retainer 18 has three lips 1S which titinto recesses inthe shell 15to prevent the disc Yfrom rotating. The shell 15 has a lianged portionto permit holes tor rivets 15a or to spot weld it to the extendedportion 10a of the plate 10.

rlChe internal friction orbrake mechanism of the modilication shown inFigures 6 and 7 is substantially the same as that shown in the otherforms', the only difference being that the supporting plate, designatedas 10", has an extended section that'is bolted tothe bumper t at 28.

The opposing ends of links 7- and 1G overlap and receive the projectingend of the pin 1l to which the lever 25 is piveted in the mannerhereinbe'fore stated. The link 7 is bolted to thebumper asat 8.1' Thefriction plate 6a isdisposed between theshell 15 and plate 10b and anextension thereoiis pivoted to a link 29, as indicated at 30. panionylink 29 lis pivoted to the link 16. Both links 29 are pivoted to abracket 12, at 13, and are limited in their pivotal movement in onedirection by the stop bolt 14. The bracket. 12 may be secured to thevehicle in any determinate way. By screwing the pin 11 in or out thepressure applied to the levers 2O may be regulated to varyy the actionot the friction, or brakemechanism.

'lVhen an obstruction is struck by the bumper bar Al it forces the barback, which in turn pivots the brake mechanism througli the links 1G, 7and plates 6 and 10. ln doing7 .so the torce ol the impact is dissipatedby the friction between the friction plate" 5 and ythe Vfriction discsor rings 17. uThe friction members or rings may be of any suitablematerial such as that now used for friction clutches'. The frictionmembers are held together or in contact by the pressure lever 25 whichadmits of instant application or release of the-friction, or brakemechanism. i The pressure exerted through the lever 25 A comis augmentedbythe levers 2O to create suliicient resistance to the movement of thebun'lpcr when striking an object. lhen the lever 25 is moved to aposition in line with the pin 11 the brake is released and whenyadjustedgto a position at a right angle to lthe pin-11 the brake isset. The brackets 12 are lined and the supporting plates 10 or 10b`are'jliivoted thereto to swing laterally in one direction only from anormal position which, in the'present instance, is outwardly, as shownby the dotted lines in Fig. 1. The stop bolts 1i limit the inwardmovement. lhe links G incline to the lineA oli; draft of the vehicle,henceturn when the bumper is struck. The bumper usually strikes at oneendv or to one side of itsv center,"hence it Vyields at onevend to theimpact and pivots at the opposite end as shown most clearly in Figure 1by the dotted lines;

. Having thus described the inventiomwhat l. claim is: 'l 1. A bumpermechanism comprising a link connection between the bumper and vehicleand pivoted to the latter, anda rotary brake mechanism in the length ofythe link connection and movable therewith andadapted to be actuated bythe pivotal movement thereof. f y

2. ik bumper mechanism comprising a link connection between the bumperand vehicle and pivoted to the latterand havinga limited pivotalmovement in tone direction, anda rotary lbrake mechanism in the lengthor the link'connectionand movable therewith and adapt-ed to be actuatedby the pivotal movement thereof. j

3. ln combination with a 'vehicle and a bumperL bar, ofY a linkconnection between each end ot the bumper bar' andthe vehicle andpivoted to the l`atter `and having a limited lpivotal movement inl one'direction to admit ofthe bumper yielding at one en'd under impact andpivoted'atv the opposite ond, and ,a 'rotary bral'ge`-1nechanism i inthelength oi Veach ofthe/link connections and movable therewith andadaptedito .otter rcsistance to the yieldingA movement of Vthe bumper. Yf i i. l

s. A; bumper mechanism comprising alink connection between the bumperand vehicle and pivoted to the latter and inclined to the line of' draftto break joint outwardly, and a rotary brake mechanism inthe length ofthe link connection and movable ltherewith and adapted tobe actuated bythe pivotal movement thereof. f i

5. A bumper mechanism comprising a link and plate connection between'`the bumper and vehicle pivoted to each other and to the vehicle, and arotary brakefmechanism between the pivotal ends of the link and plateand adapted to be operated bythe pivotal movement thereof. f y

6. A ybumper mechanism comprising a link El l) and plate connectionVbetween the bumper and vehicle pivoted to each other, a. brakemechanism between the pivotal ends of the link and plate, a link betweenthe bumper and brake mechanism, and vmeans partlyv supported bv the lastmentioned link fortensioning -tlie brake mechanism. Y

7. A bumper mechanism eon'iprisiiigr a linkand plate connection. betweenthe bumper' and vehicle pivotedto each other, a brake mechanism betweenthe pivotal ends ot 4the link and plate, pivotally connected linksbetween the bumper and vehicle, and brake tensioning;` means including:rpm engaging the last mentioned links in line with their pivot-ilconnection, and a lever pivotedi to the outer end ot the said pm.

S. A bumper mechanism comprising` a link and plate connection betweenthe bumper and vehicle pivoted to each other, a'biakeV mechanism betweenthe pivotal ends of the link and plate, brake tensioningr levers, amanuall;7 operable pin for actuating the brake tensioning levers, andmeans cooperative with said pin `for varying' the action or releasing'the said brake tensioning;` levers.

9. A bumper mechanism comprisingr a link and plate connection betweenthe bumper and vehicle pivotally connected to4 each' other, brakeelements mounted on the plates and disposed on opposite sides of thelinks, a

pressure member, levers liaving` one end en?- g'aging the pressuremember, a pin adjustably engaging the said levers, and a man-y uallyoperable lever pivotedto the said pin and adapted to actuate or releasethe pressure exerted `on the ysaid levers.

' l0. .A bumper mechanism comprising/.pivotally connected membersbetween the bumper and veliicle,brake elements mounted upon one of themembers upon opposite sides of the other member, pivoted links betweenthe bumper and vehicle, pressurelevers for the brake elements, anabutting' elementfor the.v

.inner ends ofthe pressure levers, a pin adjustablvv engaging saidabutting element-and f paesmgthrough the links in line ywith their@ vpivotal connection, anda lever pivot-ed `to` loosely through the shelland pivoted links,

and an operating lever pivoted to the projecting end of the pin formoving it to create a pressure on the saidv levers or tourelease the`pressure. and the brake mechanism;

ln testimony whereof I aliX my signature.

EMIL F. OHLENDORF. [n s]

